13 Feb 2025 - 05:57 EST
13 Feb 2025 - 10:57 UTC
13 Feb 2025 - 10:57 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 28°N - 79°W - North Atlantic Ocean
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2344 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2344 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2345 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2345 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2346 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2346 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2347 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2348 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2348 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2349 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2350 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2350 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2351 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2351 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2352 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2352 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2353 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2353 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2354 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2354 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2355 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2355 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2356 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2356 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2357 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2357 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2358 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jun 2024 - 2358 UTC


GLM Flash Extent Density over Band 13 is the number of lightning flashes that occur within a grid cell over a given period of time. FED was the first GLM product routinely available to weather service forecasters. The FED product is the best single metric to convey both the quantity and extent of lightning activity. It is useful for both storm trending applications and to depict geographic coverage.
In the FED13 visualization, GLM is superimposed on infrared Band 13 rendered in gray scale.
GLM data is produced between 54°N and 54°S.
• For more details, see the Geostationary Lightning Mapper Quick Guide, (PDF, 1.98 MB)